Electric power tool

Abstract

An electric power tool includes a motor, an output unit driven by the motor, a metallic housing, a cover, an electrical part, and a battery mounting portion. The metallic housing houses the output unit and extends forward. The cover is made of resin that covers at least a part of the housing. The electrical part is disposed on a front portion side of the housing. The battery mounting portion has positive and negative terminals to which a mounted battery is electrically connected. On an outer surface between front and rear faces of the housing, a connecting portion of a ground wire connected to the negative terminal of the battery mounting portion is disposed in a conductive state with the outer surface. A partitioning portion is formed in the cover and partitions between a lead wire for electrical component connected to the electrical part and the connecting portion.

1 . An electric power tool comprising:
 a motor;   an output unit driven by the motor;   a metallic housing that houses the output unit and extends forward;   a cover made of resin that covers at least a part of the housing;   an electrical part disposed on a front portion side of the housing; and   a battery mounting portion to which a battery as a power source is mountable, the battery mounting portion having positive and negative terminals to which the mounted battery is electrically connected, wherein   on an outer surface between front and rear faces of the housing, a connecting portion of a ground wire connected to the negative terminal of the battery mounting portion is disposed in a conductive state with the outer surface, and   a partitioning portion is formed in the cover, the partitioning portion partitioning between a lead wire for electrical component connected to the electrical part and the connecting portion.   
     
     
         2 . The electric power tool according to  claim 1 , further comprising:
 a main body including the motor and the output unit and extending in a front-rear direction; and   a handle extending downward from the main body, wherein   the battery mounting portion is disposed at a lower end of the handle,   the connecting portion is disposed on a lower surface of the housing, and   the partitioning portion is disposed on a lower surface of the cover.   
     
     
         3 . The electric power tool according to  claim 2 , wherein
 the connecting portion projects downward from the lower surface of the housing through the cover,   the partitioning portion projects downward from the lower surface of the cover, and   the lead wire for electrical component is wired in a front-rear direction on an opposite side of the connecting portion across the partitioning portion.   
     
     
         4 . The electric power tool according to  claim 3 , wherein
 the connecting portion, the partitioning portion, and the lead wire for electrical component overlap with one another in a left-right direction.   
     
     
         5 . The electric power tool according to  claim 4 , wherein
 the connecting portion is integrally formed with the lower surface of the housing and projects downward through a slit formed on the lower surface of the cover, and   the partitioning portion is integrally formed with an end portion of the slit and projects downward.   
     
     
         6 . The electric power tool according to  claim 1 , wherein
 the partitioning portion has a bent portion that is bent to a side of the lead wire for electrical component, and   the cover, the partitioning portion, and the bent portion form a wiring route of the lead wire for electrical component.   
     
     
         7 . The electric power tool according to  claim 6 , wherein
 a front wall piece is disposed at a front end of the partitioning portion ahead of the connecting portion, and the front wall piece is bent to an opposite side of the bent portion.   
     
     
         8 . The electric power tool according to  claim 1 , wherein
 an outer housing that partially covers the cover is disposed on a lower side of the cover, and   the connecting portion and the partitioning portion are arranged between the cover and the outer housing.   
     
     
         9 . The electric power tool according to  claim 1 , wherein
 the partitioning portion is integrally formed with the cover.   
     
     
         10 . The electric power tool according to  claim 1 , wherein
 the connecting portion is a screw fastening portion, and   the partitioning portion is positioned in a withdrawal direction of a screw with which the ground wire is installed to the screw fastening portion and is close to or in contact with a head of the screw.   
     
     
         11 . The electric power tool according to  claim 10 , wherein
 the ground wire, the partitioning portion, and the lead wire for electrical component overlap with one another in a left-right direction.   
     
     
         12 . The electric power tool according to  claim 1 , wherein
 the electrical part is a light for illumination.   
     
     
         13 . The electric power tool according to  claim 1 , wherein
 the output unit is a hammering unit that applies intermittent hammering in a direction of rotation to an anvil projecting forward,   the housing is a hammer case that supports the anvil, and   the cover is a hammer case cover that covers an outside of the hammer case.   
     
     
         14 . The electric power tool according to  claim 1 , wherein
 the connecting portion is a screw fastening portion,   the screw fastening portion is formed on a lower surface of the housing and projects downward through the cover,   the partitioning portion extends in a front-rear direction on a lower surface of the cover and partitions between the screw fastening portion and the lead wire for electrical component, and the partitioning portion is positioned in a withdrawal direction of a screw with which the ground wire is installed to the screw fastening portion and is close to or in contact with a head of the screw, and   a bent portion that is bent to a side of the lead wire for electrical component is formed at a lower end of the partitioning portion, and a wiring route of the lead wire for electrical component is linearly formed by the cover, the partitioning portion, and the bent portion in a state of overlapping with the screw fastening portion and the ground wire in a left-right direction.